AppRegistry mishandles keys inherited from Object.prototype

Description

The public AppRegistry stores app and section keys in plain object literals. Looking up an unregistered key such as constructor returns an inherited Object member. Registering the valid string key __proto__ mutates the registry prototype rather than creating an own entry, so the app/section key lists omit it.

The defect is present in React Native 0.87.1 and current main.

Steps to reproduce

Call AppRegistry.getRunnable("constructor"), then register an app or section named __proto__ and inspect getAppKeys() / getSectionKeys().

Expected behavior

Only explicitly registered keys should resolve, and all string app/section keys should be stored as ordinary own entries.

React Native Version

0.87.1 and current main.

Comienza por los puntos de entrada públicos de AppRegistry mencionados en el informe: getRunnable(), registerApp o el registro de secciones, y getAppKeys()/getSectionKeys(). Reproduce los casos de búsqueda del constructor y de registro de proto, y después inspecciona cómo se almacenan y resuelven las claves. Se considera terminado cuando los nombres heredados no registrados no se resuelven y cada clave de tipo string registrada aparece en la lista de claves correspondiente.